\begin{myenv}
	\part{main title}
		part body

		\chapter{\emph{emphasise}title text} 

		 body text body text
		 \section{section text}
		  section body
		 \section{section text}
		  section body
		  \subsection{sub title}
			  subsection body subsection body
			  \subsubsection{subsub section title}
				  subsubsubsubsubsubsub

		\chapter{second chapter} 

		 chapter body chapter body
	\part{another part}
		more parts!

		\chapter{more chapter! :)}

		 some mathematics:
		 \[
			 x^2
		 \]
		 \subsection{and some section}
			 to wrap things up
\end{myenv}
